Choose where you are
Should you go outside and look up?
The next hour of aurora, for your exact sky: the odds, the dark, the clouds, and which way to face.
Where to look
The next hour at your latitude
Probabilities from the model's full forecast distribution of Hp30, the half-hourly planetary geomagnetic index, for the hour starting now.
What the Sun is sending
Loading the solar wind measured a million and a half kilometres upstream…
The last twelve hours
How this works
Measured upstream. Spacecraft at the L1 point, 1.5 million km sunward, sample the solar wind every minute. That wind reaches Earth 20 to 80 minutes later, so the next stretch of weather is already known.
Read by an open model. TabPFN, an open-weights tabular foundation model, reads 2,000 labelled half-hours from 1998 to 2019 in context. It is never trained on them; it returns a full probability distribution for the coming hour's geomagnetic activity.
Mapped to your sky. One distribution answers every latitude: your geomagnetic latitude sets the activity level you need, and the page adds darkness, cloud cover and the direction to face.
Tested on 2023 to 2026, years the model never saw. Replay a real storm night: London, 10 May 2024 · Chicago, 10 October 2024. Code and results: GitHub.